Carl alexander martifs



UNITED STATES PATENT OFFICE.

CARL ALEXANDER MAR'lIl fi, O1 B ERLIN, GERMANY, ASSIGNOR -TO THE AC'llEN-(RESELLSGIIAFT FUR ANILIN FABRIKATION, OF SAME PLACE.

PROCESS OF MAKlNG AZQ DYES.

SPEGTFEATION forming'part of Lettextsratent No. 456.627,datcd July 28, 1891.

Original application filed August 22, 1888, Serial No. 283,462. Divided and this applioatibn filed daniiany 24. 1890- Sarial No: 337,997. (No specimens.) Patented in England April 20, 1888, No. 5,910.

and Empire of Germany, have invented oer- 5- tain-new and useful Improvements in. the

lilauufacture of Coloringdilatters, .(for which I have obtained a patent in England, .No.

5,910, dated April 20, 1888;) and I do hereby I declare that "the following is a full, clear, and

to exact description of the inventiomwhich'will enable others skilled in the art to which itap pertains to make and use the same.

This invention relates to certain. improve:

.ments in the production of coloring-matters, more fully set'forth hereinafter.

An alpha-naphthol disulphon ic acid is formed by treating naphthaline disnlphonic' acid (as obtained by treating naph-thaline with sulphuric acid, monochlorhydrine, or fuming sulphuric acid) with .nitric acid, then reducing the alpha-nitronaphthaliue disulphonic acids so formed to alpha-amidonaphthaline disulphonic acid and converting the said alpha-amidonaphthalinel disulphonic acid into the correspondingalpha-naphtholdisulphonic' 5 acid. This alpha-naphthol'disulphonic acid gives, by thecombination wit-h diazo com pounds, red, browmviolet, or bluish azo coloring-matters, of which the following are -ex-' amples: I

' Example l.Colorlng-matter from the new alpha-naphthol disulphouic. acid and xyli r dine. 15.75 kilos of hydrochlorate of xylidine are dissolved in one hundred liters of muriatic acid. To this is slowly added, 1111- der continuous stirr1ng,a solution of 6.9 kilos te'red into seven hundred kilos of water containing 3&8 kilosofthe sodiuinsalt of the new a1 pha-naphthol disulphonic acid, and carbonate of sodium enough to keep the liquid alkaline until the process is completed. The

formed dye-stuff is separatedby precipitation with common sand-pressed and dried. It

dyes wool with yellowishred shades in an acidulat-edhath. It in the above-described example the 15.7 5, kilos of hydrochlorate jot xylidi'ne are replaced by theequivalent quantityof the hydrochlorates of cumidine, alpha naphthylaminc, beta-naphthylaminm amide water and acidulated with twelve kilosof acid azoalphainaphthylainine, red violet;-

'sulphonic acid with nitric acid,,reducing the auo-benzole, and'amidoazo-toluol, dye-studs are obtained whichlikewiseyield on woolen stnifs, in'acidulated baths, very fair shades. 55

' The coloring-matter from cumidi'nc dyes red; jialpha-naphthylamine,brown,heta-naphthylamine, red brown, amidoazo-benzole, brown;

amidoazo-toluol, brogvn/ Y Example 2.-If 'u example 1 the xylidiue is replacedby equivalent quantities of naphthio'nic'aci'd,sulphauilic acid, azoalpha-naphth'yl'amine', alpha-n aphthylami-nc, disul phonic acid,azoalpha-naphthylamine or hetamaphthylamiue'disulphonic acid azoalpha-naphthylamine, useful coloring-matters are ohtainedwhich yield on woolen stuffs, inacidu laited baths, the following shades: The color-, V

in g-inatter from na phthionic acid dyes brown red; beta 7 naphthylam-ine, beta sulphonic 7c acid, red; sulphanilic acid, azoalpha-naphthylamine,brown; beta naphthylamine. alpha-sulphonic acid azoalpha-naphthylamine, brown; alpha naphth'ylamine disulp'honic V. 75. beta naphthylamine disulphonic acid-G- azoalpha-naph-thyla'mine,bluish black.

"Fh'is application is adivision of my origi- A nal application for improvement in azo colors, filed August 22,1888;Serial No. 283,462.

Whatl claim is- The process of producing azo" colors,:wh-ich consists-in first forming an alpha na'ph'thol disulphonic acid by treating naphthaline dialpha-nitro naphthaline disnlphonic acids so formed, to alpha-amide naphthaline'disuljphonic acid and converting said alpha-amide naphthaline disulph'onic acid into the correspending compoundalpha naphthol disul- 9Q phonic acid; secondly, forming an diazo de r-ivative of an amidocompound, suclras xylidine cumidine, alphanaphthylamine, 8 0.,

and, thirdly,-adding the said alpha-naphthol. disulphonic acid; to the diazo compound so formed. c

In testimony that I claim the foregoing as myown I aflix my ,s'ighature in presence of two'witnesses. a p Y I CARL ALEXANDER MARTIUS, Witnessesfl p ARTHUR '0. HALL,

HENRYBLATR, p p p 9 .Mount Street, lllanchesier. 

